Itinerary questions for low budget solo trip to south pacific

hi there!
reading previous posts i understand that as a generalization the south pasific islands are an expensive destination.
but do you think that it is possible to find the low budget path somewhere?
going solo will increase the cost, i guess, but i hope not so much.
my main interests, for a couple of weeks, are tribes/villages/trekking/nature/beaches!
if you could suggest anything feasible in terms of cost/accessibility/safety it would be a great help, so i can focus to specific destinations in my ongoing research!
many thanks
Nikos

Check exploringsolomons for all sorts of options that might meet your needs in Solomon Islands.